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CHEM 212 > CH 17 Chemical Equilibrium > Flashcards

CH 17 Chemical Equilibrium Flashcards

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1
Q

True or False: Chemical equilibrium is a dynamic state because reactions continue to occur, but because they occur at the same rate, no net change is observed on the macroscopic level.

A

True: Rate of reaction (fwd) = rate of reaction (rev)

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2
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What is the equilibrium constant for the following reaction?

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11
Q

True or False: Only substances that appear in the expression for Q can have an effect.

A

True

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12
Q

True or False: A change in concentration will effect the value of K proportionally.

A

False A change in concentration has no effect on the value of K

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13
Q

True or False: Changes in pressure have no effect on the value of K

A

True

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14
Q

True or False: Adding an inert gas has no effect on the equilibrium position.

A

True: Adding an inert gas has no effect on the equilibrium position, as long as the volume does not change.

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15
Q
A

AB + heat -> A + B Reaction is endergonic so adding heat on the left side of the reaction will cause it to shift to the right to maintain equilibrium.

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16
Q
A

A + B -> AB + heat (Exothermic)
Adding heat will cause the reaction to shift to the left

17
Q

van’t Hoff equation

A
18
Q

True or False: a catalyst only increases the rate of the forward reaction.

A

False: A catalyst speeds up a reaction by lowering its activation energy. It therefore speeds up the forward and
reverse reactions to the same extent.

19
Q

True or False: A catalyst causes a reaction to reach equilibrium more quickly, and can shift the equilibrium position proportionally.

A

False: A catalyst causes a reaction to reach equilibrium more quickly, but has no effect on the equilibrium position.

20
Q

In a system in which n changes, reducing Volume (increasing P) will:

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22
Q

Relation of Gibb’s Free Energy to Keq

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`

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CHEM 212 (6 decks)

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